year 12 by divya ranjith https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb made with love en-us 2021-03-10 18:59:57 UTC 2025-01-22 17:27:01 UTC hello@padlet.com Fluids divyaranjith195 https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1338666026  When water vapour in the atmosphere cools it condenses, forming tiny drops of water.  These drops increase in size by colliding with each other and fall back to the ground as rain. (a) As a raindrop falls through the air it eventually reaches its terminal velocity.  The upthrust on the raindrop can be considered to be negligible.   (i) Explain what is meant by the terminal velocity of the raindrop. 

]]> 2021-03-22 15:50:45 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1338666026 Kainaat https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341151578 1a) (i) terminal velocity is when acceleration is zero and drag forces equal normal force. An object dropped from rest will increase its speed until it reaches terminal velocity

(ii) v= 6.96 m/s]]> 2021-03-23 04:21:03 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341151578 Reem Hani https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341163512 1.(a)(i) terminal velocity is velocity at which acceleration is zero, and when the total upward force is equal to the total downward force. its a constant velocity.

(ii) A = π x (0.002)^2 = 1.26 x 10^-5 m2
V = 4/3 x π x (0.002)^3 = 3.35 x 10^-8 m3
m = 1000 x 3.35 x 10^-8 = 3.35 x 10^-5
W = 3.35 x 10^-5 x 9.81 = 3.29 x 10^-4 
3.29 x 10^-4  = 0.45 x 1.2 x 1.26 x 10^-5 x v^2
v = 6.96 ms ]]> 2021-03-23 04:28:06 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341163512 Faris https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341164134 1)a)i) Terminal velocity is the constant maximum velocity the rain drop reaches when there is no acceleration.Terminal velocity occurs when there will be no resultant force acting on the rain drop.
ii) A=pi x r^2
    A=pi x (0.002)^2 = 1.26 x 10^-5
    V=4/3 x pi x (0.002)^3= 3.35 x 10^-8
   P=m/v
    m= 1000x3.35x10^-8= 3.35x10^-5
W=mg
W=3.35 x 10^-5 x 9.81= 3.29 x 10^-4
W=F
3.29 x 10^-4= 6.8x10^-6 x v^2
V=6.96ms





    
    

]]> 2021-03-23 04:28:27 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341164134 Raseela https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341167027 Q1)a)i) terminal velocity is a constant velocity reached when the weight and drag forces are balanced and their resultant force is 0.
ii) 6.96 m/s]]> 2021-03-23 04:30:06 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341167027 Fardeen Shaikh f_sheikhh02 https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341173294 (i)Terminal velocity is the maximum velocity of the rain which makes the resultant force = 0

(ii) V = 6.96 m/s^-1]]> 2021-03-23 04:33:50 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341173294 Sarah https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341177165 Terminal velocity is the maximum velocity obtained by an object so since the net force of the raindrop is zero so the acceleration will also be zero]]> 2021-03-23 04:35:53 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341177165 abdulla https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341183080 (i)  the terminal velocity is constant constant velocity that the rain reached when the weight is equal to drag and upthrust , when  the force is zero.
(ii)  A = pi*(.002)^2 = 1.26 * 10^-5 m^2 

 V = 4 /3 pi*  (0.002 m )3 = 3.35 *10^-8 m^3

 m =1000 kg m-3 * 3.35 *10^-8 m^3 = 3.35 *10^-5 kg 
 W = 3.35 * 10^-5 kg * 9.81 N kg^-1 = 3.29 * 10^-4 N 

 3.29 * 10^-4 N = 0. 45 *1.2 kg m^-3 * 1.26 * 10^-5 m2 * v 2 

 3.29 * 10-4 N = 6.80 * 10^-6 *v 2 
v=  6.96 m s^-1 


]]> 2021-03-23 04:38:53 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341183080 Ibtihaj https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341186444 Q1 (a) (i) terminal velocity is a constant velocity when weight, upthrust and drag are balanced.]]> 2021-03-23 04:40:39 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341186444 ahmed ally https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341197213 Q1a)i) terminal velocity is when the resultant force is zero which means velocity will be constant when weight,upthrust, drag are all balanced.
ii)pi x r^2=A
3.141 x (0.002)^2=1.256x10^-5m^2
V=4/3x3.141x(0.002)^3=3.35x10^-8
m=PxV
1000x(3.35x10^-8)=3.35x10^-5
W=3.35X10^-5x9.81=3.286x10^-4

3.286x10^-4=6.8x10^-6xv^2
v^2= 3.286x10^-4/6.8x10^-6
v= square root of 48.32
v=6.951ms


]]> 2021-03-23 04:45:59 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341197213 Sawsan https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341227061 1. a) Terminal velocity is reached when weight= drag force so resultant force is zero. Terminal velocity is reached when the acceleration is zero 
As object accelerates downwards due to force of gravity the air resistance increases and eventually weight=air resistance 
ii) A=pi r^2 
A= pi (0.002)^2= 1.26 * 10^-5 m^2
V= 4/3 * pi * (0.002)^2= 3.35* 10^-8 m^3
P=m/v 
M= 1000 * 3.35 * 10^-8= 3.35 * 10^-5 kg 
W=mg 
W= 3.35 * 10^-5 * 9.81= 3.29 * 10^-4 N 
3.29 * 10^-4 = 6.80 * 10^-6 * v^2
V= 6.96 ms 

]]> 2021-03-23 04:59:20 UTC https://padlet.com/divyaranjith195/4eu5mc5cp5n273kb/wish/1341227061